181406856 has 64 divisors (see below), whose sum is σ = 468074880. Its totient is φ = 58544640.

The previous prime is 181406843. The next prime is 181406879. The reversal of 181406856 is 658604181.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 249165 + ... + 249891.

It is an arithmetic number, because the mean of its divisors is an integer number (7313670).

Almost surely, 2^181406856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 181406856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (234037440).

181406856 is an abundant number, since it is smaller than the sum of its proper divisors (286668024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

181406856 is a wasteful number, since it uses less digits than its factorization.

181406856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1054 (or 1050 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 181406856 is about 13468.7362436125. The cubic root of 181406856 is about 566.0888039230.

The spelling of 181406856 in words is "one hundred eighty-one million, four hundred six thousand, eight hundred fifty-six".